kept a straight face的意思|示意

He kept a straight face and remained speechless.

他绷着脸不说话。

I kept a straight face as long as I could, but I finally had to crack up.

我尽量板着面孔，但最后还是控制不住失声大笑起来。

Tom kept a straight face while telling the joke.

汤姆说这一笑话时，丝毫不露声色。

All of them kept a straight face when they heard the non funny joke.

听到这个并不好笑的笑话，他们都板着脸。